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	  <h1> <u> <MARQUEE> WELCOME  To Online Test !! </MARQUEE> </u> </h1>
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	         Please, Fill up information and answer the questions below.
	  </h2>
	  <h5> NAME : <input type="text" id="text1" value="" /> </h5>
	  <h5> ID_NO:  <input type="text" id="text2" value="" /> </h5>
	  <h3> <u> QUESTIONS: </u> </h3>

	  <ol>
	  <h1>SET A</h1>
	      <li> 1 Program to Check Even or Odd  </li>
		  <textarea rows="20" cols="100">
		      #include <stdio.h>
               int main()
               {
           int number;
       printf("Enter an integer: ");
       scanf("%d", &number);
      // True if the number is perfectly divisible by 2
         if(number % 2 == 0)
         printf("%d is even.", number);
       else
       printf("%d is odd.", number);
      return 0;
     }
           </textarea>
		   <br>
		   <br>
		  <li> 2: Program to Swap Numbers Using Temporary Variable ? </li>

		       <textarea rows="20" cols="100">
 #include <stdio.h>
int main()
{
      int firstNumber, secondNumber, temporaryVariable;

      printf("Enter first number: ");

      scanf("%d", &firstNumber);

      printf("Enter second number: ");

      scanf("%d",&secondNumber);

      // Value of firstNumber is assigned to temporaryVariable

      temporaryVariable = firstNumber;

      // Value of secondNumber is assigned to firstNumber

      firstNumber = secondNumber;

      // Value of temporaryVariable (which contains the initial value of firstNumber) is assigned to secondNumber

      secondNumber = temporaryVariable;

      printf("\nAfter swapping, firstNumber = %d\n", firstNumber);

      printf("After swapping, secondNumber = %d", secondNumber);

      return 0;
}
 </textarea>
			<br>
		        <br>

			<li>  3:Program to Print ASCII Value?  </li>

			 <textarea rows="20" cols="100">
#include <stdio.h>
 int main()
{

      char c;

      printf("Enter a character: ");

      // Reads character input from the user

      scanf("%c", &c);


      // %d displays the integer value of a character

      // %c displays the actual character

      printf("ASCII value of %c = %d", c, c);

      return 0;
}
</textarea>
                       <br>

		    <li>  4: Reverse an Integer  ? </li>

                 <textarea rows="20" cols="100">
#include <stdio.h>
int main()
      {

      int n, reversedNumber = 0, remainder;

      printf("Enter an integer: ");

      scanf("%d", &n);

      while(n != 0)
    {

      remainder = n%10;

      reversedNumber = reversedNumber*10 + remainder;

      n /= 10;

      }

      printf("Reversed Number = %d", reversedNumber);

      return 0;
}

             </textarea>

			<br><br>


			<li> 5: Program to Count Number of Digits in an Integer </li>
				 <textarea rows="20" cols="100">
#include <stdio.h>
int main()
{

    int n;

     int count = 0;

     printf("Enter an integer: ");

     scanf("%d", &n);

     while(n != 0)

     {

     // n = n/10

     n /= 10;

     ++count;

}

     printf("Number of digits: %d", count);
}

				</textarea>

				<li> 6:  Program to Check Palindrome: </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>
int main()
{

     int n, reversedInteger = 0, remainder, originalInteger;

     printf("Enter an integer: ");

     scanf("%d", &n);

     originalInteger = n;

     // reversed integer is stored in variable

     while( n!=0 )

 {

     remainder = n%10;

     reversedInteger = reversedInteger*10 + remainder;

     n /= 10;
    }
    // palindrome if orignalInteger and reversedInteger are equal

     if (originalInteger == reversedInteger)

     printf("%d is a palindrome.", originalInteger);

     else

     printf("%d is not a palindrome.", originalInteger);


     return 0;
}
</textarea>

<li> 7:  Program to Check Leap Year: </li>
				 <textarea rows="20" cols="100">
 #include <stdio.h>
int main()
{

     int year;

     printf("Enter a year: ");

     scanf("%d",&year);

     if(year%4 == 0)
    {

     if( year%100 == 0)
        {

    // year is divisible by 400, hence the year is a leap year

     if ( year%400 == 0)
     printf("%d is a leap year.", year);

     else
     printf("%d is not a leap year.", year);
        }

     else

     printf("%d is a leap year.", year );

 }
   else

     printf("%d is not a leap year.", year);


     return 0;
}
</textarea>
<li> 8:   Check if a Number is Positive or Negative Using if...else
  </li>
				 <textarea rows="20" cols="100">


#include <stdio.h>

int main()
{

     int number;

     printf("Enter a number: ");

     scanf("%d", &number);

     if (number <= 0)

     {

     if (number == 0)

     printf("You entered 0.");

     else

     printf("You entered a negative number.");

     }

     else

     printf("You entered a positive number.");

     return 0;
}
</textarea>


<li> 9:   Program to Check Prime Number

  </li>
   <textarea rows="20" cols="100">

 #include <stdio.h>
int main()
{

     int n, i, flag = 0;
     printf("Enter a positive integer: ");

     scanf("%d",&n);
     for(i=2; i<=n/2; ++i)
    {

     // condition for nonprime number

     if(n%i==0)

     {

     flag=1;

         break;

  }
    }

     if (flag==0)

     printf("%d is a prime number.",n);

     else

     printf("%d is not a prime number.",n);

     return 0;
}
</textarea>

<li> 10:  Program to Check Alphabet: </li>
				 <textarea rows="20" cols="100">

Example 10: Program to Check Alphabet

#include <stdio.h>
int main()
{

     char c;

     printf("Enter a character: ");

     scanf("%c",&c);

     if( (c>='a' && c<='z') || (c>='A' && c<='Z'))

     printf("%c is an alphabet.",c);

     else

     printf("%c is not an alphabet.",c);

     return 0;
}
</textarea>

                                   <h1> SET B </h1>


								   <li> 11: Program to print half pyramid using : </li>
				 <textarea rows="20" cols="100">

 #include <stdio.h>
int main()
{
     int i, j, rows;
     printf("Enter number of rows: ");
     scanf("%d",&rows);
     for(i=1; i<=rows; ++i)
     {
        for(j=1; j<=i; ++j)
        {
            printf("* ");
        }
        printf("\n");
     }
     return 0;
}
</textarea>
					   <li> 12: Program to print half pyramid using : </li>
				 <textarea rows="20" cols="100">

#include<stdio.h>
int main() {
    int side, area;

    printf("\nEnter the Length of Side : ");
    scanf("%d", &side);

    area = side * side;
    printf("\nArea of Square : %d", area);

    return (0);
}

</textarea>

   <li> 13: Swich/Case grade
 </li>
				 <textarea rows="20" cols="100">


#include <stdio.h>
int main () {
   /* local variable definition */
   char grade = 'B';
   switch(grade) {
      case 'A' :
         printf("Excellent!\n" );
         break;
      case 'B' :
      case 'C' :
         printf("Well done\n" );
         break;
      case 'D' :
         printf("You passed\n" );
         break;
      case 'F' :
         printf("Better try again\n" );
         break;
      default :
         printf("Invalid grade\n" );
         break;
   }

   printf("Your grade is  %c\n", grade );

   return 0;
}
</textarea>

 <li> 14:Here is a example to add two integers. To perform this task, a user-defined function addNumbers() is defined.

 </li>
				 <textarea rows="20" cols="100">
 #include <stdio.h>
int addNumbers(int a, int b);         // function prototype
int main()
{
    int n1,n2,sum;
    printf("Enters two numbers: ");
    scanf("%d %d",&n1,&n2);
    sum = addNumbers(n1, n2);        // function call
    printf("sum = %d",sum);
    return 0;
}
int addNumbers(int a,int b)         // function definition
{
    int result;
    result = a+b;
    return result;                  // return statement
}

</textarea>


  <li> 15: Book id and price with structure
 </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>

struct Books {

   int   book_id;
   int price;
};

int main( ) {
   struct Books Book1;    	/* Declare Book1 of type Book */
   struct Books Book2;    	/* Declare Book2 of type Book */

   /* book 1 specification */

   Book1.book_id = 6495407;
   Book1.price = 250;

   Book2.book_id = 6495700;
   Book2.price = 300;
   /* print Book1 info */

   printf( "Book 1 book_id : %d\n", Book1.book_id);
	printf( "Book 1 price : %d\n", Book1.price);
   /* print Book2 info */

   printf( "Book 2 book_id : %d\n", Book2.book_id);
 printf( "Book 2 price : %d\n", Book2.price);
   return 0;
}
</textarea>

<li> 16: Book id and price with structure
 </li>
				 <textarea rows="20" cols="100">
#include <stdio.h>

struct Car {

   int   car_id;
   int price;
};

int main( ) {
   struct Car Car1;
   struct Car Car2;

   Car1.car_id = 101;
   Car1.price = 1000000;

   Car2.car_id = 102;
   Car2.price = 1500000;

   printf( "Car 1 car_id : %d\n", Car1.car_id);
   printf( "Car 1 price : %d\n", Car1.price);

   printf( "Car 2 car_id : %d\n", Car2.car_id);
   printf( "Car 2 price : %d\n", Car2.price);
   return 0;
}
</textarea>


 <li> 17: 17: Accessing array element
 </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>

int main () {

   int n[ 10 ]; /* n is an array of 10 integers */
   int i,j;

   /* initialize elements of array n to 0 */
   for ( i = 0; i < 10; i++ ) {
      n[ i ] = i + 100; /* set element at location i to i + 100 */
   }

   /* output each array element's value */
   for (j = 0; j < 10; j++ ) {
      printf("Element[%d] = %d\n", j, n[j] );
   }

   return 0;
}
</textarea>


<li> 18 : Factorial of a Number

 </li>
				 <textarea rows="20" cols="100">
#include <stdio.h>
int main()
{
	int n, i;
	int factorial = 1;
	printf("Enter an integer: ");
	scanf("%d",&n);
	// show error if the user enters a negative integer
	if (n < 0)
    	printf("Error! Factorial of a negative number doesn't exist.");
	else
	{
    	for(i=1; i<=n; ++i)
    	{
        	factorial *= i;          	// factorial = factorial*i;
    	}
    	printf("Factorial of %d = %llu", n, factorial);
	}
	return 0;
}
 </textarea>

 <li> 19: Find greater,less,equal
 </li>
				 <textarea rows="20" cols="100">

 #include<stdio.h>
int main()
{
  int x = 10;
   int y = 5;

  if(x == y)
 	printf("Equal");
  else if(x > y)
 	printf("Greater");
  else
 	printf("Less");

}
</textarea>

<li> 20: Find armstrong number
 </li>
				 <textarea rows="20" cols="100">

 #include<stdio.h>

   int main()
	{
	int n,r,sum=0,temp;

	printf("enter the number=");
	scanf("%d",&n);
	temp=n;
	while(n>0)
	{
	r=n%10;
	sum=sum+(r*r*r);
	n=n/10;
	}
	if(temp==sum)
	printf("armstrong  number ");
	else
	printf("not armstrong number");

	}
</textarea>

<h1> SET C  </h1>

<li> 21: Find armstrong number
 </li>
				 <textarea rows="20" cols="100">

#include<stdio.h>

   int main()
	{
	int a[10],n,i;
	printf("Enter the number to convert: ");
	scanf("%d",&n);
	for(i=0;n>0;i++)
	{
	a[i]=n%2;
	n=n/2;
	}
	printf("\nBinary of Given Number is=");
	for(i=i-1;i>=0;i--)
	{
	printf("%d",a[i]);
	}

	}
</textarea>


<li> 22: Array In C programming to find out the average of 4 integers
 </li>
				 <textarea rows="20" cols="100">
 #include <stdio.h>
int main()
{
	int avg = 0;
	int sum =0;
	int x=0;
	/* Array- declaration – length 4*/
	int num[4];
	/* We are using a for loop to traverse through the array
 	* while storing the entered values in the array
 	*/
	for (x=0; x<4;x++)
	{
    	printf("Enter number %d \n", (x+1));
    	scanf("%d", &num[x]);
	}
	for (x=0; x<4;x++)
	{
    	sum = sum+num[x];
	}
	avg = sum/4;
	printf("Average of entered number is: %d", avg);
	return 0;
}
</textarea>

<li> 23: while loop
 </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>
int main()
{
   int count=1;
   while (count <= 4)
   {
	printf("%d ", count);
	count++;
   }
   return 0;
}
</textarea>

<li> 24:Do while loop
 </li>
				 <textarea rows="20" cols="100">
#include <stdio.h>
int main()
{
	int j=0;
	do
	{
		printf("Value of variable j is: %d\n", j);
		j++;
	}while (j<=3);
	return 0;
}
</textarea>

<li>25 :Function subtraction

 </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>
int subtraction(int a, int b)
{
     int c=a-b;
     return c;
}

int main(
{
    int var1 =10;
    int var2 = 20;
    int var3 = subtraction(var1, var2);
    printf("%d", var3);

    return 0;
}
</textarea>

<li>26 :Function multiplication

 </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>
int multiplication(int a, int b)
{
     int c=a-b;
     return c;
}

int main(
{
    int var1 =10;
    int var2 = 20;
    int var3 = multiplication(var1, var2);
    printf("%d", var3);

    return 0;
}

</textarea>
<li>27 :Function Dividation

 </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>
int dividation(int a, int b)
{
     int c=a-b;
     return c;
}

int main()
{
    int var1 =10;
    int var2 = 20;
    int var3 = dividation(var1, var2);
    printf("%d", var3);

    return 0;
}
</textarea>

<li>28 :Switch case check value

 </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>

int main ()
{
   int value = 3;
   switch(value)
   {
 	case 1:
 	printf(“Value is 1 \n” );
 	break;

 	case 2:
 	printf(“Value is 2 \n” );
 	break;

 	case 3:
 	printf(“Value is 3 \n” );
 	break;

 	case 4:
 	printf(“Value is 4 \n” );
 	break;

 	default :
 	printf(“Value is other than 1,2,3,4 \n” );
   }
   return 0;
}
</textarea>

<li>29 :Switch case check week

 </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>

int main()
{
    int week;

    /* Input week number from user */
    printf("Enter week number(1-7): ");
    scanf("%d", &week);

    switch(week)
    {
        case 1:
            printf("Monday");
            break;
        case 2:
            printf("Tuesday");
            break;
        case 3:
            printf("Wednesday");
            break;
        case 4:
            printf("Thursday");
            break;
        case 5:
            printf("Friday");
            break;
        case 6:
            printf("Saturday");
            break;
        case 7:
            printf("Sunday");
            break;
        default:
            printf("Invalid input! Please enter week number between 1-7.");
    }

    return 0;

</textarea>


<li>30 :Switch case check vowel or consonant

 </li>
				 <textarea rows="20" cols="100">

#include <stdio.h>
int main()
{
    char ch;

    /* Input an alphabet from user */
    printf("Enter any alphabet: ");
    scanf("%c", &ch);

    /* Switch value of ch */
    switch(ch)
    {
        case 'a':
            printf("Vowel");
            break;
        case 'e':
            printf("Vowel");
            break;
        case 'i':
            printf("Vowel");
            break;
        case 'o':
            printf("Vowel");
            break;
        case 'u':
            printf("Vowel");
            break;
        case 'A':
            printf("Vowel");
            break;
        case 'E':
            printf("Vowel");
            break;
        case 'I':
            printf("Vowel");
            break;
        case 'O':
            printf("Vowel");
            break;
        case 'U':
            printf("Vowel");
            break;
        default:
            printf("Consonant");
    }

    return 0;
}
</textarea>


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